Organic lights-emitting device with doped emission layer

Details Organic lights-emitting device with doped emission layer Organic lights-emitting device with doped emission layer

2007-01-09

2007-01-09

Santiago, Mariceli (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S506000, C313S503000, C428S690000

Reexamination Certificate

active

10913532

ABSTRACT:
An OLED has a doped emission layer (EML). The OLED comprises a first electrode, a second electrode, and an EML having a host material and a light-emitting dopant and interposed between the first electrode and the second electrode, wherein the light-emitting dopant has a concentration gradient between a first surface close to the first electrode of the EML and a second surface opposite to the first surface. As a result, luminous efficiency of the OLED can be enhanced and a driving voltage can also be reduced.

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patent: 6541909 (2003-04-01), Motomatsu
patent: 2002/0197511 (2002-12-01), D'Andrade et al.
patent: 2003/0068525 (2003-04-01), Bellmann et al.
patent: 2004/0263067 (2004-12-01), Saitoh et al.
patent: 2005/0168137 (2005-08-01), Adamovich et al.
patent: 10-2002-0030370 (2002-04-01), None

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